Sanding wheel



Jan; 15, 1935. A. PEARSON 1 Patented Jan. 15, 1935 UNITED STATES SANDING WHEEL Arthur-L. Pearson, High Point, N. 0., assignmof one-third to Globe Parlor Furniture Company, a corporation of North Carolina, and one-third to C. R. Barrier, both of High Point, N. 0.

Application February 19, 1934, Serial No. 712,024

7 Claims.

The invention relates to abrasive wheels, commonly known as sanding wheels, and is intended primarily for the so-called spindle sanding in furniture manufacture and analogous arts.

Heretofore, due to the way of cutting the sanding cloth or the like and the manner of securing it upon the wheel, there has been a great deal of this material wasted. .It is the object of the present invention however, to provide a new and improved construction in which practically all of a sanding strip surrounding the periphery of the wheel is used, thereby doing away with the waste which has "commonly existed heretofore.

The sanding wheel is providedwith a plurality of transverse peripheral grooves, a sanding strip surrounds the wheel and is provided with loop portions extending into said grooves,

and strip retainers are seated in said 100p portions. Further objects are to provide strip retainers of unique and advantageous form, to provide novel means for holding said retainers in operative position, and to provide retainers of resilient nature which. by their own resiliency are held tensionally engaged with the loops of the. sanding strip, insuring that this strip shall always be held tightly around the wheel periphery. A still further object is to'provide 'a novel relation between the length of the loop portions and the distance between the same, said relation being such that when the exposed portions of the sanding strip are worn away, the strip retainers may be released and said strip circumferentially moved upon the wheel so that the previously unworn loop portions may be exposed for use and the worn portions may be looped into the grooves for engagement with the strip retainers, enabling use of all sanding material on the wheel.

A still further object is to provide a construction which is rather simple and inexpensive, yet will be eflicient, durable and long-lived, and will permit quick and easy interchange of sanding strips.

With the foregoing in view, the invention resides in the novel subject matter hereinafter described and claimed, description being accomplished by reference to the accompanying draw- Fig. 1 is an edge view showing a sanding wheel constructed in accordance with the present invention.

Fig. 2 is a side elevation looking in the direction of the arrow A of Fig. 1,

Fig. 3 is a sectional view on line 33 of Fig. 2.

Fig. 4 is a sectional view in another plane, as indicated by line 44 of Fig. 3.

.Fig. 5 is a duplicate of Fig. 2 but showing a wheel in which the transverse grooves are much deeper and in which the loop portions of the sanding strip are correspondingly longer, al- .lowing circumferential shifting of the strip upon the wheel to expose new portions of the strip for use, as above explained.

The construction herein disclosed may be considered as preferred, although it is to be understood that within the scope of the inven-' tion as explained, numerous minor variations may be made. Moreover, the term sanding strip is not to be considered as limiting to a strip having an abrasive surface formed from sand, for any other abrasive surface would sufflce. In fact, if the strip performed a function other than that of abrading for instance, a polishing function, such departure would clearly lie within the scope of the invention.

In the present disclosure, the wheel comprises a rigid body and. a resilient rim, both of which may be of any desired shape and construction, and obviously the transverse formation of the rim may vary with the character of work to be performed by the wheel. The wheel herein shown comprises main and auxiliary metal portions 6 and '7 detachably engaged with each other and jointly forming a peripheral channel 8 and a resilient rim 9 of rubber or the like having its inner peripheral portion tightly held in this channel. The rim 9 projects outwardly beyond the channel and in this projecting portion is formed with a plurality of transverse circumferentiallyspaced, relatively deep and narrow grooves 10. A sanding strip 11 surrounds the rim 9 and is transversely foldedto'provide it with a plurality of U-shaped loops 12 which extend into the grooves 10,- the ends of the strip being overlapped in one of the grooves, as denoted at 13. -Retainers 14, preferably formed from spring wire, are seated in the loops 12-and are connected with the wheel so as to hold the sanding strip 11 in place, and when said retainers are of the preferred resilient nature. their own resiliency holds them tensionally engage'd with said loops to always hold the sanding strip tightly upon the wheel.

Each retainer 14, in the present showing, comprises a U-shaped length of wire having one of its arms 15 disposed at one side of the wheel and its other arm 16 disposed at the opposite side of said wheel. The arm 15 is pivotally 55 connected with the wheel, preferably by providing the wheel with an apertured flange 1'7 and by providing said arm with an eye 18, saideye arm is preferably bent upon itself as at 20 to.

provide .a curved shoe. Opposite sides of the wheel may well be grooved radially as shown at 21, to partially receive the arms and 16 so that they need not project as far beyond the wheel sides as would otherwise be necessary.

An actuating disk 22 is provided .for moving the various strip retainers 14 to operative position and .holding them tightly engaged with the loops 12, in which connection, attention is invited to the fact that the bight portions 23 of said retainers are seated in said loop portions. The disk 22 is provided with cam means 22' engaging the curved ends of the arms 16, for the purpose of moving these arms radially toward the spindle 24 which carries the wheel and disk. The section 6 of the wheel body abuts a shoulder 25 on the spindle 24, and a nut 26 is provided on the end of said spindle to move the disk .22 inwardly. This inward movement of the disk 22 moves the strip retainers 14 to operative position and they are tightly held'in this position. Moreover, if said retainers be formed of resilient wire as preferred, they are sprung or tensioned by moving the disk 22 toward the wheel, and said retainers are thereby held tensionally engaged with the loops 12 to always insure that the strip 11 shall be'tight upon the wheel. Whenever necessary, nut 26 may be re.- moved allowing outward movement of the disk 22 to free the arms 16, thereby allowing the various retainers 14 to be swung to inoperative posi- .tions, allowing removal of the strip 11 and substitution of another. The parts may then be again 'moved toand held in operative position and the wheel is in readiness for further use.

In Fig. 5,,the grooves 10 are deeper with respect to the distance between said grooves, than in the other figures, and the loops 12 within said grooves are of a length which is substantially half the distance between said loops. The ends of the sanding strip are overlapped in one of the grooves 'as above described, but quite a surplus 13 is left at one end of the strip. When the exposed portions of this strip have been wornaway, the retainers 14 may be released, the strip 11 removed from the wheel, and said stripre-applied so that the previously protected loop portions 12 will be exposed for use at the periphery of the wheel, the worn portions of the strip being then looped into the grooves 12 for engagement with the retainers 14. The surplus 13 at one end of the sanding strip 11 is necessary to allow this circumferential shifting of the strip upon the wheel to present new wearing surfaces. With the exception of this surplus and proportioning of parts, the wheel shown in Fig. 5 is identicalwith that shown in the other views, and the same reference characters have, therefore, been employed.

It will be seen from the foregoing that novel and advantageous provision has been made for carrying out the objects -of the invention, and

attention is again invited to the possibility of making variations within the scope of the invention as claimed.

What is claimed is:

1. A sanding wheel comprislnga wheel having transverse peripheral grooves, a sanding strip surrounding said wheel and having U-shaped loops extending into, said grooves, a plurality of U-shaped yokes each of which is transversely unbroken from end to end, said yokes straddling said wheel and having their bight I portions seated in said loops, and means engaging ends of said yokes for moving said ends toward the wheel axis, causing sa-id yokes to tighten the sanding strip around the wheel.

2. A sanding wheel comprising a wheel having transverse peripheral grooves, a sanding strip surrounding said wheel and having U-shaped loops extending into said grooves, a plurality of U-shaped yokes each of which is transversely unbroken from end to end, said yokes straddling said wheel and having their bight portions seated in said loops, means for holding the yoke ends at one side of the wheel against movement away from the wheel axis, and means engaging the yoke ends at the other side of the wheel for moving these yoke ends "toward said wheel axis to tighten the sanding strip around the wheel. a

3. A sanding wheel comprising a wheel having transverse peripheral grooves, a sanding strip surrounding said wheel and having U-shaped loops extending into said grooves, a plurality of U-shaped yokes each of which is transversely unbroken from end to end, said yokes straddling said wheel andhaving their bight portions seated in said loops, means pivotally mounting the yoke ends at one side of the wheel and holding said ends against movement away from the wheel axis, and means engaging the yoke ends at the other side of the wheel for moving these yoke ends toward said wheel axis to tighten the sanding strip around the wheel.

4. A sanding wheel comprising a wheel having transverse peripheral grooves, a sanding strip surrounding said wheel and having U-shaped loops extending into said grooves, a plurality of U-shaped yokes each of which is transversely unbroken from end to end, said yokes straddling said wheel and having their bight portions seated in said loops, means for holding the yoke ends at one side of the wheel against movement away from the wheel axis, a disk at the other side of the wheel having cam means engaging the yoke ends at this side of the wheel for forcing these yoke ends toward the wheel axis when said disk is forced toward said wheel, and means for so forcing said disk.

5. A sanding wheel comprising a wheel having transverse peripheral grooves, a sanding strip surrounding said wheel and having U-shaped loops extending into said grooves, a plurality of U-shaped yokes each of which is transversely unbroken from end to end, said yokes straddling said wheel and having their bight portions seated in said loops, means for holding the yoke ends at. one side of the wheel against movement away from the wheel axis, a disk at the other side of the wheel having a continuous cam engaging the yoke ends at this side of the wheel for forcing these yoke ends toward the wheel axis when said disk is forced toward said wheel, and means for so forcing said disk.

6. A sanding wheel having a central spindle opening, the periphery of said wheel being provided with transverse grooves, a sanding strip surrounding said wheel and having U-shaped loops extending into said grooves. a plurality of U-shaped yokes each transversely unbroken from end to end, the arms oi. said yokes beins disposed at opposite sides of said wheel, the bight portions of said yokes being seated in said loops, means pivotally connecting the yoke arms at one side of the wheel with said one side of said wheel; the arms of the yokes at the other side of the wheel having their ends directed laterally away from said other side of said wheel, and a disk spaced outwardly from saiu other side of the wheel and having a central spindle opening, said disk having cam means engaging said laterally directed arm ends tor-moving the latter toward the wheel axis upon shitting of said disk toward the wheel when wheel and disk are clamped on a spindle.

7. A sanding wheel comprising a wheel having transverse peripheral grooves, a sanding strip surrounding said wheel and having U-shaped loops extending into said grooves, U-shaped resilient yokes whose bight portions are seated in said loops, the ends 0! said yokes being disposed at opposite sides of said wheel, and means connecting said yoke ends with said wheel and loops.

ARTHUR L. PEARSON.

holding said yokes tensionally engaged with said u 

